Upgrade paths

Before you begin the upgrade process, it is important to understand your upgrade paths.

HDF upgrade paths

HDF 3.4.x
HDF 3.3.x
HDF 3.2.x

If you are running an earlier HDF version, upgrade to at least HDF 3.2.x, and then proceed to the HDF 3.4.1.1 upgrade.

HDP and Ambari versions

Supported HDP versions – 3.0.x, 3.1.0
Supported Ambari versions – 2.7.0 - 2.7.3

	Warning
We strongly discourage downgrading from Kafka 2.1.0 to earlier versions. Though Ambari allows you to downgrade to earlier versions of Kafka after you upgrade to 2.1.0, consider the following before you do so: If you upgrade both the broker and consumer to 2.1.0, a downgrade might cause data loss. If you upgrade the broker to 2.1.0 and the consumer remains at 2.0.0, then you can downgrade the broker to 2.0.0 without any issue.

Warning

We strongly discourage downgrading from Kafka 2.1.0 to earlier versions. Though Ambari allows you to downgrade to earlier versions of Kafka after you upgrade to 2.1.0, consider the following before you do so:

If you upgrade both the broker and consumer to 2.1.0, a downgrade might cause data loss.
If you upgrade the broker to 2.1.0 and the consumer remains at 2.0.0, then you can downgrade the broker to 2.0.0 without any issue.